package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import com.sun.org.apache.bcel.internal.generic.RETURN;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        dishMapper.insert(dish);

        List<DishFlavor> dishFlavorList = dishDTO.getFlavors();

        if(dishFlavorList != null && dishFlavorList.size() != 0){
            dishFlavorList.forEach(dishFlavor -> {
                dishFlavor.setDishId(dish.getId());
            });
            dishFlavorMapper.insertBatch(dishFlavorList);
        }
    }

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否在售
        for(Long i:ids){
            Dish dish = dishMapper.getById(i);
            if(dish.getStatus()!= StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断菜品是否与套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            //当前菜品被套餐关联了，不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品及其关联的口味
        for(Long i:ids){
            dishMapper.deleteById(i);
            dishFlavorMapper.deleteByDishId(i);
        }
    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        Dish dish = dishMapper.getById(id);

        DishVO dishVO = new DishVO();
        List<DishFlavor> dishFlavorList = dishFlavorMapper.getByDishId(id);

        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavorList);
        return dishVO;
    }

    @Override
    @Transactional
    public void update(DishDTO dishDTO) {
        //修改菜品表
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        //删除原有口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //增加新口味
        List<DishFlavor> dishFlavorList = dishDTO.getFlavors();
        if(dishFlavorList!=null && dishFlavorList.size()>0){
            dishFlavorList.forEach(dishFlavor -> {
                dishFlavor.setDishId(dish.getId());
            });
        }
        dishFlavorMapper.insertBatch(dishFlavorList);
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.startOrStop(status,id);
    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
